[Runtime] Support launch an url from launcher.

After commit 4f4eca4773e7e4a98dc0198fdca1bae1886c749e

We always compile a Shared Process Model binary for
tizen, and it always run as shared process model, so we cannot
launch a page with url like 'xwalk http://www.google.com'.

There is an easy way that we can support launch an url from
launcher, and create an temp app for url.

BUG=XWALK-2060
Yes, @pozdnyakov has announce the reconstruction (of storage) in mail list, and on Tizen, xwalk have to run under service mode. Look: https://github.com/crosswalk-project/crosswalk/pull/2151